Add support for T-Digest (#2214)

* wip

* close #2216 - add support for TDIGEST.MERGESTORE and make compression optional on TDIGEST.CREATE

* fix some tdigest commands, use bloom edge docker

* fix index.ts

* 2.4-RC2 (v2.4.1)

* fix some commands and tests

* clean code

packages/bloom/lib/commands/t-digest/INFO.spec.ts

@@ -0,0 +1,25 @@
+import { strict as assert } from 'assert';
+import testUtils, { GLOBAL } from '../../test-utils';
+import { transformArguments } from './INFO';
+
+describe('TDIGEST.INFO', () => {
+    it('transformArguments', () => {
+        assert.deepEqual(
+            transformArguments('key'),
+            ['TDIGEST.INFO', 'key']
+        );
+    });
+
+    testUtils.testWithClient('client.tDigest.info', async client => {
+        await client.tDigest.create('key');
+
+        const info = await client.tDigest.info('key');
+        assert(typeof info.capacity, 'number');
+        assert(typeof info.mergedNodes, 'number');
+        assert(typeof info.unmergedNodes, 'number');
+        assert(typeof info.mergedWeight, 'number');
+        assert(typeof info.unmergedWeight, 'number');
+        assert(typeof info.totalCompression, 'number');
+        assert(typeof info.totalCompression, 'number');
+    }, GLOBAL.SERVERS.OPEN);
+});